In plants that undergo double fertilization, the structure that forms to nourish the seed is called the
a. endosperm.
b. egg cell.
c. gamete.
d. cone.

Answer;

-Endosperm

Explanation;

-In plants that undergo double fertilization, the structure that forms to nourish the seed is called the endosperm.

-Double fertilization occurs when one sperm cell fuses with the egg to produce a diploid zygote, and the other sperm cell fuses with the two polar nuclei to make  a triploid cell that develops into the endosperm.

- Endosperm is a  tissue that surrounds and nourishes the embryo in the seeds of angiosperms (flowering plants).

A

Explanation:

liquid crystals are matters in a state which have properties between those of conventional liquids and those of solid crystals[1]. liquid crystal is partially ordered and anisotropic. in terms of molecular order, liquid crystal molecules have one-dimensional or two-dimensional long - range order.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation: